SQL Server 2008 contains a new feature designed to help troubleshoot particularly tricky connectivity problems. This new feature, the Connectivity Ring Buffer, captures a record for each server-initiated connection closure, including each kill of a session...

Understanding the error message: “Login failed for user ''. The user is not associated with a trusted SQL Server connection.”
This exact Login Failed error, with the empty string for the user name, has two unrelated classes of causes, one of which...